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/******************************************************************************
*
* Copyright (C) 2002 Hugo PEREIRA <mailto: hugo.pereira@free.fr>
*
* This is free software; you can redistribute it and/or modify it under the
* terms of the GNU General Public License as published by the Free Software
* Foundation; either version 2 of the License, or (at your option) any later
* version.
*
* This software is distributed in the hope that it will be useful, but WITHOUT
* Any WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*
*******************************************************************************/
#include "SshTunnel.h"
#include "Debug.h"
#include "SshSocket.h"
namespace Ssh
{
//______________________________________________________
Tunnel::Tunnel( QObject* parent, QTcpSocket* socket ):
QObject( parent ),
Counter( "Ssh::Tunnel" ),
tcpSocket_( socket ),
sshSocket_( new Socket( this ) )
{
Debug::Throw( "Ssh::Tunnel::Tunnel.\n" );
buffer_.resize(maxSize_ );
connect( tcpSocket_, SIGNAL(readyRead()), SLOT(_readFromTcpSocket()) );
connect( tcpSocket_, SIGNAL(disconnected()), SLOT(close()) );
connect( sshSocket_, SIGNAL(connected()), SLOT(_readFromTcpSocket()) );
connect( sshSocket_, SIGNAL(readyRead()), SLOT(_readFromSshSocket()) );
connect( sshSocket_, SIGNAL(readChannelFinished()), SLOT(close()) );
}
//______________________________________________________
void Tunnel::close()
{
Debug::Throw( "Ssh::Tunnel::close.\n" );
tcpSocket_->close();
sshSocket_->close();
}
//______________________________________________________
void Tunnel::_readFromTcpSocket()
{
Debug::Throw( "Ssh::Tunnel::_readFromTcpSocket.\n" );
if( !sshSocket_->isConnected() ) return;
// read from socket, write through ssh
qint64 bytesAvailable = 0;
while( (bytesAvailable = tcpSocket_->bytesAvailable()) > 0 )
{
qint64 bytesRead = tcpSocket_->read( buffer_.data(), buffer_.size() );
emit debug( QString( "Ssh::Tunnel::_readFromTcpSocket - bytesAvailable=%1, bytesRead=%2" ).arg( bytesAvailable ).arg( bytesRead ) );
if( bytesRead < 0 )
{
emit error( tr( "invalid read from tcp socket: %1" ).arg( bytesRead ) );
return;
}
ssize_t bytesWritten = 0;
ssize_t i = 0;
do
{
i = sshSocket_->write( buffer_.data() + bytesWritten, bytesRead-bytesWritten );
Debug::Throw() << "Ssh::Tunnel::_readFromTcpSocket - written: " << i << endl;
if (i < 0)
{
emit error( tr( "invalid write to tcp socket: %1, error: %2" ).arg( i ).arg( sshSocket_->errorString() ) );
return;
}
bytesWritten += i;
} while( i > 0 && bytesWritten < bytesRead );
}
return;
}
//______________________________________________________
void Tunnel::_readFromSshSocket()
{
Debug::Throw( "Ssh::Tunnel::_readFromSshSocket.\n" );
// read from socket, write through ssh
qint64 bytesAvailable = 0;
while( (bytesAvailable = sshSocket_->bytesAvailable()) > 0 )
{
qint64 bytesRead = sshSocket_->read( buffer_.data(), buffer_.size() );
emit debug( QString( "Ssh::Tunnel::_readFromSshSocket - bytesAvailable=%1, bytesRead=%2" ).arg( bytesAvailable ).arg( bytesRead ) );
if( bytesRead < 0 )
{
emit error( tr( "invalid read from ssh socket: %1" ).arg( bytesRead ) );
return;
}
ssize_t bytesWritten = 0;
ssize_t i = 0;
do
{
i = tcpSocket_->write( buffer_.data() + bytesWritten, bytesRead - bytesWritten );
if (i < 0)
{
emit error( tr( "invalid write to tcp socket: %1" ).arg( i ) );
return;
}
bytesWritten += i;
} while( i > 0 && bytesWritten < bytesRead );
}
return;
}
}
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